Fix inverted Y coordinates in normals

Conflicts:
	plater.py

Crudely arranges the added STLs on the bed. Does not attempt to optimise for
space or anything, just arranges them in a rough grid.

French translation + minor gui changes

- french translations
- added some translated strings in pronterface.py
- resized macro window and control's positions
- reordered main menu

necessary for windows compatibility

This reverts commit d2b90ebe, reversing
changes made to 8af5496a.

Added a macro and button definition for controlling fan

Resize preview window on main window resize.

Fix erroneous number of elements returned from function call

PLA temps set to better defaults.